You can search for the year on the marauders map now. Simply click on all users and search for the year you want, and all users in that year will be listed, together with their house (:

This is not possible since it would be too much work to create different cards for the different sites. Also, when someone gets banned for some reason, their card would have to be removed, which causes trouble with any possible collections. 

Please contact the chief editors of the newspapers on your site with this idea, they're always open for new ideas and inspiration (: